public static Ns3.LaneRate make_lane_rate_distance(string src, string dest, float costperkm)
    {
        var lr = new Ns3.LaneRate
        {
            Id                 = ("lr:" + src + "->" + dest),
            Source             = src,
            Destination        = dest,
            unitDimensionCosts = { make_udc("distance", 1.0f, costperkm) }
        };

        return(lr);
    }
    public static Ns3.LaneRate make_lane_rate_distance_weight(string src, string dest, float costperkm, string weightdim, float costperunit)
    {
        var lr = new Ns3.LaneRate
        {
            Id                 = ("lr:" + src + "->" + dest),
            Source             = src,
            Destination        = dest,
            unitDimensionCosts = { make_udc(weightdim, 1.0f, costperunit) }
        };

        if (costperkm != 0.0f)
        {
            lr.unitDimensionCosts.Add(make_udc("distance", 1.0f, costperkm));
        }
        return(lr);
    }